<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    p{
      width: 100px;
      height: 100px;
      border: 1px solid #e43636;
    }
    span{
      width: 100px;
      height: 100px;
      border: 1px solid #000;
    }
    input{
      width: 100px;
      height: 100px;
      border: 1px solid #31c72c;
    }
  </style>
</head>
<body>
  <div>hello</div>
  <p>彭于晏</p>
  <span>world</span>
  <a href="https://www.baidu.com">百度</a>
  <input type="text" name="" id="">
</body>
</html>